Column
Biology
Creed
7 min read

Not just red in tooth and claw: biology's big debates

In the second of a series, biologist and priest, Andrew Davison, examines why it’s important to keep up with biology’s big debates.

Andrew works at the intersection of theology, science and philosophy. He is Canon and Regius Professor of Divinity at Christ Church, Oxford.

An osprey, in flight, holds a fish in its claws.
‘Wherever there’s water or air to navigate, the laws of fluid dynamics are bound to throw up wings, and bodies shaped like fish.’
Photo by Mathew Schwartz on Unsplash.

There’s hardly been a livelier time for evolutionary science than today; indeed, passions can run high. It’s not that Darwin’s vision of evolution is fundamentally in doubt: species adapt by natural selection, there’s variation between individuals, and those better adapted for their environment survive more often, passing on their genes to their children. In that, the theory of evolution stands, but many other parts of the evolutionary picture from the second half of the twentieth century are coming under criticism. That includes the following maxims:  

‘the only significant form of inheritance involves genetic code’, 

‘nothing that happens to an organism during its lifetime is passed on to its progeny’,  

‘we agree what we mean by “species”’,  

‘genes pass down the branches of the tree of life, not between them’,  

and ‘evolution is fundamentally all about competition, not cooperation’. 

Among the excellent crop of writers on these themes, Eva Jablonka and Marion Lamb stand out for their elegant prose, and a gift for communicating complex ideas clearly. As they recognise, the standard mid-twentieth century model of evolution might be worth criticising, but it’s also landed all sorts of important basic points. (They list ten.) The shortfall of the earlier, dominant theory was in being too narrow, with each insight too quickly eclipsing others.  

Here are two examples. First, the classic twentieth century picture saw inheritance in terms of DNA and genes, passed on by ‘germline’ cells, such sperm and pollen. That’s all true, but it shouldn’t restrict our wider view of inheritance to that. Today, writers such as Jablonka and Lamb stress that organisms inherit from their parents (or parent) in all sorts of ways.  

A second plank of the twentieth century picture is that evolution involves descent from a common ancestor. Again, that says something vital, even central, accepted by evolutionist old and new. The twentieth century position, however, added a restriction: that’s all that’s important on this score. The newer perspective recognises that while genes are – of course – central, and passed on from parent to child, organisms also swap genes between themselves (between branches of the tree of life, not just along those branches), even between very different species. 

If we’re not careful, what’s written and taught (not least by theologians), even with the best will in the world, will be thirty or even fifty years out of date. 

There’s a lot of excitement around these sorts of claims (and, remember, Jablonka and Lamb make eight more), and that can get quite noisy. Defenders of the older, narrower picture typically say that the newer themes are simply fuss over minor points. Advocates of the newer perspective disagree, saying that the twentieth century picture risks missing some important features of biology, which are now coming into better focus. 

Why such debates matters 

Why might this ferment among biologists matter for a site like this one, and for theologians, and discussions of religious matters? Well, for one thing, as I pointed out in my previous article, nothing quite dissolves the supposed animosity between science and religion (which is, after all, a relatively recent invention) like theologians and religious people getting excited about biology. It’s also important that any humanities scholar, the theologian among them, who’s engaging with science should keep up to date. If we’re not careful, what’s written and taught (not least by theologians), even with the best will in the world, will be thirty or even fifty years out of date. 

But there’s more at stake. As we have seen, the twentieth century picture, for all it brought an admirable clarity to evolutionary thought, was reductionistic. We see that in Jablonka and Lamb’s exhortation to scientists: ‘yes, stress x, but don’t think that means you have to deny y.’ A religious vision tends to be an expansive one. It wants to recognise the reality and value of all sorts of things. Yes, there’s matter, atoms, molecules, and genes, but there’s also organisms, agents, cultures, groups, economies, hopes, loves. They’re all real. We can’t reduce one to the other: not organisms to genes, or agents to economies. A turn from reduction is welcome. 

More than that, almost everything in the emerging twenty-first century view of evolution is fascinating from a theological perspective.  

Take convergence, for instance. It turns out that evolution isn’t just driven by randomness, or by the demands of the surroundings. Also important are various features of physics, or mathematics – the contours of reality – that throw up elegant solutions to evolutionary problems, which are adopted by evolution time and again. Wherever you need to sturdy and space-efficient packing of cells (as in a honey comb, or a a wasp’s nest), the hexagon is ready and waiting.  Wherever there’s water or air to navigate, the laws of fluid dynamics are bound to throw up wings, and bodies shaped like fish, dolphins, and penguins (which are all quite similar in shape).  

How do we know this? Because evolution has converged on wings and that body shape independently, many times, as also on eyes, and everything else that Simon Conway Morris lists in the nine closely printed columns of convergences in the index to his book Life’s Solution. Evolution certainly involves randomness and need, but alongside them is something more like Plato’s forms: timeless realities, there to be discovered and put to work. Among the more theological of these eternal verities, covered in Conway Morris’s book, are perception, intelligence, community, communication, cooperation, altruism, farming, or construction 

 Exceeding a zero-sum game 

Then there’s cooperation. Ever since Darwin’s Origin was published, and, even more, ever since Tennyson wrote about nature ‘red in tooth and claw’, theologians have been embarrassed about the place of cooperation in their vision of the world. Now, however, it turns out, competition isn’t the only force at work in biology or evolution after all. One of the features of reality that evolution discovers and puts to work again and again is cooperation, and ways to exceed a ‘zero-sum’ game. We see that in cooperation within a species, but also in cooperation between species, which is ubiquitous in nature: called mutualism, it’s found everywhere. As a rule, once two species stick around in proximity for the long run, down many generations, their relationship will turn to mutual benefit.  

Ethicists are often wary of the suggestion that we can look at the way things are, and read a moral code there (getting an ‘ought’ from an ‘is’), but it’s an unusual person whose vision of right and wrong isn’t shaped, to some degree, by a sense of what the world is like. Well, it turns out that nature bears witness to the enduring worth of cooperation, and not only to competition.   

In the first of these articles on biology, I pointed out the significance of ethics in thinking about biology, and about evolution in particular. For better or worse, and often for worse, thinking about evolution has been an ethical, social, political story. The evolutionary has been put to work for immoral, ends. It turns out to be wrong twice over to suppose evolution commends only competition. It’s wrong, first of all, because we are rational creatures, who can aspire to an understanding of good and evil that transcends the realm of nature. But also, as we now see, it’s wrong even to suppose the nature is only red in tooth and claw. There’s competition, but there’s also a lot of cooperation.  

 

Suggested further reading 

Archibald, John. 2014. One Plus One Equals One: Symbiosis and the Evolution of Complex Life. Oxford: Oxford University Press. An accessible introduction to biological mutualism, with an emphasis on the role of hybrid organisms (one living inside another) in major evolutionary transitions. 

Bronstein, Judith L., ed. 2015. Mutualism. Oxford: Oxford University Press. The new standard treatment of biological mutualism. 

Morris, Simon Conway. 2008. Life’s Solution: Inevitable Humans in a Lonely Universe. Cambridge: Cambridge University Press. A comprehensive discussion of convergence in evolution. 

Day, Troy, and Russell Bonduriansky. 2018. Extended Heredity: A New Understanding of Inheritance and Evolution. Princeton, NJ: Princeton University Press. An engaging introduction to a broadened picture of inheritance. 

Davison, Andrew. 2020a. Biological Mutualism: A Scientific Survey. Theology and Science 18 (2): 190–210. An accessible survey of some of the science of biological mutualism. 

———. 2020b. Christian Doctrine and Biological Mutualism: Some Explorations in Systematic and Philosophical Theology. Theology and Science 18 (2): 258–78. A foray into some of the significance of mutualism for Christian theology. 

Jablonka, Eva, and Marion Lamb. 2020. Inheritance Systems and the Extended Synthesis. Cambridge University Press. A short discussion of many of the more expansive aspects proposed for contemporary evolutionary thought. 

Jablonka, Eva, Marion J. Lamb, and Anna Zeligowski. 2014. Evolution in Four Dimensions: Genetic, Epigenetic, Behavioral, and Symbolic Variation in the History of Life. Revised edition. Cambridge, MA: MIT Press. One of the most substantial discussions of the new perspective. 

Laland, Kevin, Tobias Uller, arc Feldman, Kim Sterelny, Gerd B. Müller, Armin Moczek, Eva Jablonka, et al. 2014. Does Evolutionary Theory Need a Rethink? Nature 514 (7521): 161–64. MA short two-sided piece, asking whether a transformation in evolutionary thinking is under way.  

Essay
Books
Creed
Easter
Poetry
7 min read

Of trees and truth: Tolkien on cultivating greenness

The literature of Herbert, Lewis and Tolkien all helps us see the seen and unseen better.

Jim is Director of the Marion E. Wade Center and Professor of English at Wheaton College, where he holds the Marion E. Wade Chair of Christian Thought. 

a row of flowers with green stalks and blue flowers.
Isabella Fischer on Unsplash.

Each Easter season I return to a poem called “The Flower,” written by the Anglican priest George Herbert and published shortly after his death in a collection called The Temple. In both its growth and its withering, the flower of the poem represents the poet’s spiritual life, and the verses speak powerfully to the renewal that only God can bring. “The Flower” opens in joyful exclamation— 

“How fresh, oh Lord, how sweet and clean  

Are thy returns! even as the flowers in spring” 

—but my favorite image appears at the start of the second stanza, where the poet marvels,  

“Who would have thought my shriveled heart 

 Could have recovered greenness?”  

C.S. Lewis took note of the second stanza as well. At the Marion E. Wade Center at Wheaton College, Illinois, where I work, we care for nearly 2,500 of the books that Lewis had in his personal library, many of which include his notes and underlinings. Lewis’s copy of The Temple is no exception. The back pages of the book contain a carefully constructed index in Lewis’s own hand, and one of the index entries points us back to the concluding words of the second stanza of “The Flower.” Turning to the poem, we find a hand-drawn line, very likely added by Lewis himself, running down the page alongside the stanza. I find that line to be heartening—a pointer, perhaps, to a shared interest. And though the connection between poem’s verses and the book’s appearance is purely coincidental, I appreciate the fact that Lewis’s copy of The Temple has a weathered green cover.  

What I love about “The Flower,” and about Herbert’s poetry more generally, is that it helps us see the seen thing better, helps us pay attention to it, so that we may glimpse the unseen thing. By bringing the flower into clearer focus, Herbert helps strengthen the eyes of faith. Herbert does not present nature itself as divine—the flower is a metaphor, after all—but he does represent nature in ways that point to its beauty while testifying to who God is and who we are in relation to Him.  

How during this Easter season might we recover greenness in Herbert’s sense? The poetry of The Temple is an excellent starting place. But if you are looking for another literary guide, I recommend turning (or returning) to another writer whose works we collect at the Wade Center—J.R.R. Tolkien. Should you visit the Wade to pore over the annotations in Lewis’s books, you’ll also have the chance to examine the small oak desk upon which Tolkien penned The Hobbit.  

In a note to his American publisher in June of 1955, Tolkien wrote,  

“I am (obviously) much in love with plants and above all trees, and have always been; and I find human maltreatment of them as hard to bear as some find ill-treatment of animals.”  

The parenthetical “obviously” is significant. Though Tolkien didn’t view The Lord of the Rings as autobiographical, he was willing to admit that his love of plants and trees was on full display in his life and work.  

Tolkien’s faith was on display in his writing as well, as Holly Ordway argues in her remarkable book Tolkien’s Faith: A Spiritual Biography. Ordway’s first chapter begins with Tolkien’s own words on the matter: “The Lord of the Rings is of course a fundamentally religious and Catholic work; unconsciously so at first, but consciously in the revision.” As with Tolkien’s “obviously” so too with his “of course.” After calling our attention to the latter, Ordway persuasively demonstrates the truth of Tolkien’s words, exploring in detail how his religious convictions and practices were indeed fundamental to him and his work. “The Lord of the Rings is not an allegory of the Gospels or a tale didactically expressing Christianity,” she writes. “Rather, the whole world of Middle-earth and everything in it is infused with, rooted in, its author’s Christian vision of reality.” 

Ordway’s metaphor of rootedness is a fitting one, and—in our pursuit of Herbert’s greenness—it is worth exploring the entanglements between the obvious and fundamental aspects of Tolkien’s work: his love of “growing things” (to borrow a phrase from Treebeard) and his faith.  

Consider a few of the trees that we find across Tolkien’s writings.  

In his poem “Mythopoeia,” Tolkien responds to C.S. Lewis’s view (before Lewis converted back to Christianity) that myths are beautiful yet untrue. Tolkien begins the poem among the trees, expressing Lewis’s views as follows:

“You look at trees and label them just so,

(for trees are ‘trees’, and growing is ‘to grow’).”

The problem with viewing nature in such purely naturalistic terms, Tolkien goes on to suggest, is that it ignores the origins of terms like “tree.” It leaves out the humans who name the things of the world and develop myths about them and, more importantly, it leaves out the Source of such creativity. For Tolkien, human creativity finds its beginnings in God, and we reflect Him through acts of sub-creation. Thus he writes,  

“The heart of man is not compound of lies, 

 but draws some wisdom from the only Wise, 

 and still recalls him.”  

Whether it is the simple act of identifying a tree by name or the complex development of stories across time and place—what Tolkien describes elsewhere as “the intricately knotted and ramified history of the branches on the Tree of Tales”—our creativity flows from, and is a form of reverence for, the One who created all things. 

In The Lord of the Rings, we encounter not just trees but also the tree-like Ents. Referring to himself and the other Ents as “tree-herds,” Treebeard explains to Merry and Pippin that the Ents help the trees grow and develop:  

“We keep off strangers and the foolhardy; and we train and we teach, we walk and we weed.”  

In line with Ordway’s quotation above, Tolkien’s Ents are not meant to be read allegorically; however, the tree-herding activity of the Ents reinforces the theme of stewardship in The Lord of the Rings—a theme that echoes Scripture’s call to humans to care for creation and, just maybe, encourages us to take up similar work in our own places. (For further encouragement along these lines, check out Kristen Page’s book The Wonders of Creation: Learning Stewardship from Narnia and Middle-Earth, which grew out of Page’s lectures for our annual Ken and Jean Hansen Lectureship at the Wade Center.)  

And in Tolkien’s short story Leaf by Niggle, we encounter an artist desperately trying to work on his painting of, yes, a tree. This tree stands for our efforts to create art, which, though frequently frustrated and often motivated by self-interest in this life, may be purified and brought to fruition in the age to come.  

Tolkien’s trees testify to the beginning, middle, and end of Christian story. Among their roots and trunks and branches, we encounter illustrations of his views about creation, the proper ways to care for it, and its culmination.  

In a 1945 letter, Tolkien told his son Christopher about an essay by Lewis on the truth and beauty that we find in the story of Scripture. In the essay, which Ordway observes is likely his piece “Myth Became Fact,” Lewis argued that people of faith are, in the words of Tolkien’s letter, “meant to draw nourishment from the beauty as well as the truth” of the story. But what of the person without faith who “clings” only to its beauty? According to Tolkien, Lewis maintained that such readers “still in that way get some nourishment and are not cut off wholly from the sap of life.”  

Greenness for Herbert is ultimately the Lord’s doing. We should seek, therefore, to find nourishment in the truth and the beauty of Scripture, the source of the sap of life. Growing things spring up from these pages as well: fruit trees and fig trees and oak trees and olive trees; vines and branches; a new shoot springing forth from a stump, a crown of thorns, the wood of the cross. And as the Psalmist reminds us, the one who “meditates day and night” on the law shall be “like a tree.” When we read and digest the Word of life, we grow greener.   

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